Electrical signal-bell for street-cars



J. P. ORR & T. F. .GALVIN. ELECTRICAL SIGNAL BELL FOR STREET CARS.

(No Model.)

our-10,. wukmswn u c Nirnn STATES vATENT FFicE.

JAMES P. ORR, OF PITTSBURG, AND THEODORE F.

GALVIN, or MOKEESPORT,

PENNSYLVANIA; SAID GALVIN ASSIGNOR TO GEO. H. FUGH, OF PITTS- BURG,PENNSYLVANIA.

ELECTRICAL SIGNAL-BELL FOR STREET-CARS.

SPECIFICATION forming part of Letters Patent No. 596,085, dated December28, 1897.

Application filed August 3,1896.

T at iuhom, it may concern.-

Be it known that we, JAMES P. ORR, residing at Pittsburg, and THEODOREF. GALVIN, residing at McKeesport, in the county of Allegheny and Stateof Pennsylvania, citizens of the United States, have invented a new anduseful Electrical Signal-Bell for Street-Cars, of which the following isa specification.

Our invention relates to improvements in signal-bells where a definitenumber of distinct strokes of bell is desired; and the objects of ourimprovement are, first, to provide an alarm or danger-signal that willgive automatically the desired number of strokes;

second, to afford facilities for the motorman to give the danger-signalpromptly while both hands are engaged with the levers of the motor andthe brake, respectively. We attain these objects by the mechanismillustrated in the accompanying drawings, in which- Figure 1 is a planview of entire machine with bell removed. Fig. 2 is a plan View ofcircuit-breaker and a diagrammatic viewillustrating the circuit in ourinvention. Fig. 3

is a sectional side elevation of entire machine on a centrallongitudinal line y w.

Similar letters refer to similar parts throughout the several views.

' At A, Fig. 1, is shown a pair of coils with 0 cores and vibratingarmature in the usual manner and mounted on a metallic plate B, havingan arched bell-post 13 which is pr0- vided with a screw and nut Badapted to the double purpose of holding bell G, Fig. 3,

3 5 firmly in position and providing a pivotal mounting forratchet-wheel D. Armature O is provided with lever 0 to which ispivotally connected pawl 0 adapted to engage ratchet-wheel D, producingrotary motion by 0 reciprocating lever 0 Ratchet-wheel D is providedwith rollers D, mounted near its periphery, the number of rollers beingequal to the number of strokes required on bell. Sleeve E is providedwith a short arm and ball or clapper E and a curved arm E mediallymounted and adapted to engage rollers D with its curved end and hub Dwith its straight end. Sleeve E is mounted on insulated pin E and heldin its normal position Serial No. 601,474. (No model.)

at rest by a spiral spring, which is also insu- 5o lated from plate B.

Hub D Fig. 2, has inserted in its peripheral surface an insulating-blockD adapted to receive the straight end of E when its curved end isreleased from D, Fig. 1, as shown by dotted lines, thus opening thecircuit. As E is the only conductor between pin E and hub D it isapparent that if pin E and hub D are connected temporarily, whileinsulator D is being rotated from contact with E or until Dengages theopposite end of E the break will be closed and the current will beconducted through D or directly to hub alternately as the opposite endsof E are engaged until one revolution of wheel D is completed and Eengages D WVheel D not being insulated from plate B orstandard-supporting armature 0 current is conducted by Wire or plate Bto armature-spring, making an interrupted connection with adjustingthumb- 7o screw mounted on an insulated standard. Armature-spring andthumb-screw being in contact (at rest) when the circuit is closed coresA A are magnetized and armature C drawn in contact withcores, separatingspring from thumb-screw, breaking the circuit, demagnetizing the cores,and allowing armature to return and close the circuit and againmagnetizing cores A A, thus automatically producing reciprocal motion inarmature, the electromagnetic force being applied to rotate Wheel Dthrough lever (J and pawl 0 To set wheel D in motion to give the signal,it is only necessary to connect pin E with any part of plate Btemporarily. This is preferably done by circuit-closerF which is placedin a convenient position in floor of car-platform, as shown in diagram,and electrically connected with E and D In Fig. 3, F is shown as mountedon base-supporting plate B. 0

In Fig. 1 the circuit shown is as when the motor is in motion,short-circuiting F and connections, which are omitted from this figureto avoid confusion. The direction of current is as shown byrepresentation of battery in diagram; but to amplify in the tracing ofcurrent and opening and closing circuit let it be observed thatstandard-supporting spring and armature C, also arched bell-post Bsupporting bell G and wheel D, are all electrically connected with plate13, but pin E and standard having adjusting thumb screw adapted to makean interrupted electrical connection with armature-spring C are the onlytwo parts insulated from plate B, as shown in Fig. 3. Current frombattery or dynamo is conducted to insulated standard, which is connectedwith armature-spring by thumb-screw and forms an automaticcurrentbrcaker, closing circuit through frame or other conductor withhub D which is connected with pin E by lever E which is alternately incontact with D or one of rollers D while wheel D is in motion, but incontact with insulator D when at rest. Current from pin E is conductedby insulated wire to helices A, thence to battery, or to earth ifcurrent from dynamo is used. F is a lever pivotally mounted at one endand perforated at the other end adapted to receive a pull cord or wireif located in root of car-platform, or thumb-key if located onmotor-handle, or a pedal if located in floor of car-platform and adaptedto engage contact-plate. Said lever and said contact-plate are eachconnected by wire with hub D and pin E respectively. Now if motion isarrested by a break in the circuit between these two points D and IE itfollows that if these points are connected motion will be resumed. Hencethe working circuit and the starting-circuit is the same, except aslight difference in length, limited only by the location of F which hasbeen described. Armature spring 0 is rigidly mounted on a suitablestandard and is firmly connected to armature which has an extendinglever and pawl 0 adapted to engage ratehet-wheel D, and held in contactwith the latter by a suitable spring forming an electrical as well as amechanical connection between 0 and D.

Having thus fully described our invention, we claim and desire to secureby Letters Patent- 1. In an electric signal-bell, the combination of abell-clapper and its arm, a ratchetwhcel having thereonantifriction-rollers" adapted to engage the bell-clapper arm and anautomatic circuit-opener with a lever 0 attached to a vibratingarmature, a pawl pivotally mounted on the end of the armature which isadapted to engage and propel the wheel D, substantially as described.

2. In an electric signal-bell, the combination of a bell-clapper and itsarm, a ratchet wheel having thereon antifriction rollers adapted toengage the bell-clapper arm, and an automatic circuit-opener with sleeveE, mounted on insulated pin which is electrically connected with B bycircuit-closer F for the purpose specified.

JAS. P. ORR. THED. F. GALVIN. lVitnesses:

WM. GEISLER, JOHN II. GRUNDY.

